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Table 3 Types of fragment ions and their m/z values in the RT-PSM program

From: An improved peptide-spectral matching algorithm through distributed search over multiple cores and multiple CPUs

Ion type

m/z value

b+

b

b+-H2O

b-18

b+-NH3

b-17

b+-CO(a+)

b-28

y+

y

y+-H2O

y-18

y+-NH3

y-17

y+-NH(z+)

y-15

  1. The signs ‘+’ in superscript of the letter b (and y) denote the singly charge positive ions. The symbol b (and y) without any superscript denote the m/z value of a b-(or y-)ion with a single positive charge. The symbol ‘-H2O’, ‘-NH3’, ‘-CO’ and ‘-NH’ represent an ion lose a small molecule of ‘H2O’, ‘NH3’, ‘CO’ and ‘NH’, respectively.
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ISSN: 1477-5956